12028005 has 54 divisors (see below), whose sum is σ = 23414118. Its totient is φ = 5707680.

The previous prime is 12028001. The next prime is 12028013. The reversal of 12028005 is 50082021.

12028005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9622404 + 2405601 = 3102^2 + 1551^2 .

It is not a de Polignac number, because 12028005 - 2² = 12028001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12028001) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 255892 + ... + 255938.

Almost surely, 2^12028005 is an apocalyptic number.

12028005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12028005 is a deficient number, since it is larger than the sum of its proper divisors (11386113).

12028005 is a wasteful number, since it uses less digits than its factorization.

12028005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 12028005 is about 3468.1414331022. The cubic root of 12028005 is about 229.1208086018.

The spelling of 12028005 in words is "twelve million, twenty-eight thousand, five".